Question

How can i do in C#/Windows7 , that my app do not reuse existing SSL conenction. Actually when i make a get request with HttpWebRequest to a https page if there is an existing conenction then it use this connection (= same ssl-sessionid). I have done some test and windows 7 renegotiate the ssl connection after 2 minutes . But i will that it never reuse existing connection.

i have tried a lot of things:
keep-alive, ClientCacheTime (regedit), ServicePointManager.SetTcpKeepAlive …

Thanks very much !

            ServicePointManager.Expect100Continue = true;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
            ServicePointManager.DnsRefreshTimeout = 200;
           /* ServicePointManager.SetTcpKeepAlive(false,0,0);
            ServicePointManager.DefaultConnectionLimit = 100;
            ServicePointManager.MaxServicePointIdleTime = 1;*/
        //    ServicePointManager.DefaultConnectionLimit = 1;
            uri = "https://server.com/test.jsp";

            HttpWebRequest request = (HttpWebRequest)
          WebRequest.Create(uri);
            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 6.0)";
            request.CookieContainer = cookieJar;
            request.ContentType = "text/xml";// content type

            request.KeepAlive = false;
            request.ProtocolVersion = HttpVersion.Version11;
            request.Method = "GET";
            request.ConnectionGroupName = "dsd" + i;
           // request.ReadWriteTimeout = 2000;
           /* request.Timeout = 5000;
            request.UseDefaultCredentials = false;
            request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore);
            request.ConnectionGroupName = DateTime.Now.Ticks.ToString(); */
           // X509Certificate2 cert = new X509Certificate2("C:\\a.crt", "abcd");
           X509Certificate2 cert = new X509Certificate2();
            request.ClientCertificates.Add(cert);
           /* request.PreAuthenticate = false;
            request.Pipelined = true;*/


            WebResponse rsp = request.GetResponse();
            string PageContent = new StreamReader(rsp.GetResponseStream()).ReadToEnd();


            textBox1.Text = PageContent;
            request.ServicePoint.CloseConnectionGroup("dsd" + i);
            request.Abort();

            request.ClientCertificates.Clear();
            rsp.GetResponseStream().Close();
            rsp.Close();
            request.Abort();

Answer 1

Since you don’t provide much detail just some general pointers:

• set ServicePointManager.DnsRefreshTimeout to a very low value (default is 2 minutes = 120000 ms)
• set HttpWebRequest.ConnectionGroupName to a unique value on EVERY request
• call HttpWebRequest.ServicePoint.CloseConnectionGroup with that value AFTER EVERY request
• call HttpWebRequest.Abort AFTER EVERY request

The above might work unreliably – depending on OS version and Framework version…

I am curious: achieving this means you have alot less performance… what is the goal ?